Life in the Oceans ENVI 121 – Lab

1. Life in the OceansENVI 121 – Lab Dr. Demopoulos Email: amandad@ucsd.edu http://iod.ucsd.edu/~amanda/

2. Life in the Oceans ENVI 121 – Lab Points Date Subject

3. Keeping a Lab Notebook

4. Why keep a Lab Notebook? • Record of your work • Basis for writing • Materials and Methods • Results • Back up if computer data files are lost • Study guide

5. What goes into a lab notebook? • Date and title of lab • All lecture notes • All drawings with labels • If we are doing an experiment include: methods, hypotheses, and results • Notebook should be well-organized and legible

6. Review: Scientific Method • Question • Observations • Hypothesis • testable, falsifiable • Experiment • Experimental group, controls • Results/Interpretation • Scientific Theory

7. Review: Scientific Method Induction: specific to general Deduction: general to specific

8. In situ • Uncontrolled variables • Ex situ (typically) • Fewer uncontrolled variables • Test one or a couple variables at one time • Artificial setting Review: Scientific Method Field Observations vs. Controlled Experiment

9. Field observations vs. Controlled experiment

10. Scientific experiment with Phaeodactylum tricornutum • Diatom • Unicellular algae • ~ 50-500 mm • Found in fresh and salt water ecosystems • Photosynthesize in the light, “fixing” carbon from CO2 into carbohydrates and releasing oxygen in the process http://www.marine-genomics-europe.org/gallery/displayimage.php?album=9&pos=0

11. Graphing Detective • Question: • Looking at the axes and data, what do we know about how the study was done?

12. Questions: • What else do we know about how the study was done? • What can’t you tell about how this study was done? • What specific question is being addressed? • What is the most important result shown by the graph?

13. Assignment: write 1 paragraph describing this study using the graph and legend. Due next Monday, September 18th